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slushpupie

actual-mcp

by slushpupie

add_transaction

Create a new transaction in an Actual Budget account by specifying date, amount, payee, and optional category and notes.

Instructions

Adds a new transaction to an account.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
dateYes
notesNo
amountYes
account_idYes
payee_nameYes
category_idNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations; description only says 'adds a new transaction'. Lacks details on side effects, permissions, or constraints (e.g., date format, amount units).

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness3/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Single sentence with no wasted words, but missing essential context for a tool with 6 parameters and no other documentation.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given 6 parameters with no schema descriptions and no annotations, description is too sparse to be complete. Output schema exists but not mentioned.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters1/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, and description adds no meaning to parameters. Agent must infer from names and types only.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

Description clearly states verb 'Adds' and resource 'transaction', distinguishing it from sibling tools that list, get, or retrieve balances.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use vs alternatives. Siblings are read tools, but no explicit when-not or context provided.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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